Vulnerability Details : CVE-2013-6890
denyhosts 2.6 uses an incorrect regular expression when analyzing authentication logs, which allows remote attackers to cause a denial of service (incorrect block of IP addresses) via crafted login names.
Vulnerability category: BypassGain privilegeDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2013-6890
Probability of exploitation activity in the next 30 days: 39.45%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 97 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2013-6890
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2013-6890
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When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
References for CVE-2013-6890
-
http://www.debian.org/security/2013/dsa-2826
Debian -- Security Information -- DSA-2826-1 denyhosts
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https://bugzilla.redhat.com/show_bug.cgi?id=1045982
1045982 – (CVE-2013-6890) CVE-2013-6890 denyhosts: remote denial of ssh service
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http://seclists.org/oss-sec/2013/q4/535
oss-sec: Re: [SECURITY] [DSA 2826-1] denyhosts security update
Products affected by CVE-2013-6890
- cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:7.1:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
- cpe:2.3:a:phil_schwartz:denyhosts:2.6:*:*:*:*:*:*:*